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#1 |
Registered User
Join Date: Nov 2012
Location: melbourne australia
Posts: 196
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86 SILVERADO what discs do I need?
The supplier cant tell which one I need to replace the worn front rotors on my truck.part no 5006 which are 11 7/8th
or 5032 which are 11 41/64. Truck is not here so can't measure. Also rear wheel cylinder either 2 inch or 2 3/4. Can any one help ? Vin:2gcec14h2g1170202 |
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#2 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,176
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Re: 86 SILVERADO what discs do I need?
Yes -
Here is the brake system release chart for an '87 ('86 should be the same). Scan through there and see what you find. ![]() Your truck would be the equivalent of an R10, and I believe you'll find front rotors are 11.86" (probably what they are calling 11 7/8 = 11.875). Additionally, you said "rear wheel cylinders" but your choices do not make sense. I think you meant the width of the rear brake shoes, which you will find to be 2.75". K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ Last edited by Keith Seymore; 03-28-2013 at 08:14 AM. |
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#3 |
Registered User
Join Date: Sep 2008
Location: Bailey, NC
Posts: 2,462
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Re: 86 SILVERADO what discs do I need?
Measure the thickness of the rotor. It will be 1" or 1.25". Then measure the depth of the drum. It will be 2" or 2.75".
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Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT |
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#4 | |
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Join Date: May 2009
Location: Motor City
Posts: 9,176
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Re: 86 SILVERADO what discs do I need?
Quote:
Can you see the chart? It's what we used in order to release the parts to production. K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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#5 |
Registered User
Join Date: Sep 2008
Location: Bailey, NC
Posts: 2,462
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Re: 86 SILVERADO what discs do I need?
Sorry Keith. I missed original info on the tiny phone screen.
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Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT |
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#6 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,176
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Re: 86 SILVERADO what discs do I need?
Quote:
What do you wanna bet Ozkiwi is sleeping right now? He'll probably see this when he gets up in a few hours.... (lol) K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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#7 |
Registered User
Join Date: Nov 2012
Location: melbourne australia
Posts: 196
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Re: 86 SILVERADO what discs do I need?
The brake option is J55 is that the same as JB5 ?
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#8 |
Registered User
Join Date: Sep 2008
Location: Bailey, NC
Posts: 2,462
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Re: 86 SILVERADO what discs do I need?
J55 brakes use the same rear shoes as JB5 / JD5 (11 5/32" x 2 3/4").
J55 indicates it has the HD brake system. I googled the GM RPO codes and found these pages. http://www.marshu.com/images-website...-car-codes.pdf
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Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT |
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#9 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,176
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Re: 86 SILVERADO what discs do I need?
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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#10 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,176
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Re: 86 SILVERADO what discs do I need?
Quote:
K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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